Question

I have created a simple stored procedure like this:

Alter Proc dbo.s5 
(
  @id int = 14,
  @Salary int output
)
As
Begin
  --Declare @Salary int
  set @Salary = (select Salary
                 from dbo.EmpInf
                 where EmpId = @id)
  print @Salary
  --Return @Salary
End

During execution of this stored procedure, I get this error:

Msg 201, Level 16, State 4, Procedure s5, Line 0
Procedure or function ‘s5’ expects parameter ‘@Salary’, which was not supplied.

What am I doing wrong?

Answer 1

You need to supply the @Salary variable as input variable to your stored proc even though it is marked as an output parameter.

exec dbo.s5 @id, @salary

As can be read in the following link:

Input values can also be specified for OUTPUT parameters when the stored procedure is executed. This allows the stored procedure to receive a value from the calling program, change it or perform operations with it, then return the new value to the calling program. … This is often referred to as “pass-by-reference capability.